12917564028 has 36 divisors (see below), whose sum is σ = 32659289208. Its totient is φ = 4304989920.

The previous prime is 12917563999. The next prime is 12917564039. The reversal of 12917564028 is 82046571921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160375 + ... + 227057.

It is an arithmetic number, because the mean of its divisors is an integer number (907202478).

Almost surely, 2^12917564028 is an apocalyptic number.

12917564028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12917564028 is an abundant number, since it is smaller than the sum of its proper divisors (19741725180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12917564028 is a wasteful number, since it uses less digits than its factorization.

12917564028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72074 (or 72069 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12917564028 in words is "twelve billion, nine hundred seventeen million, five hundred sixty-four thousand, twenty-eight".